Mechanical movement



June 11, 1929. ERICH EJ165413 MECHANICAL MOVEMENT Filed Oct 19 1926FIGURE 2 Patented June 11 UNITED .sTArEs OFFICE.

. REUBEN VEBICH, oFsAn JosE, CALIFORNIA.

Y MECHANICAL MOVEMENT. 1

Application filed October 19, 1926. SeriaLINo. 142,639.

It is the object of the invention to'provide a simple and efficientmechanism whereby rotary motion. may be transformed into linear motion.

It is alsoan object of the invention to provide a movement of thecharacter indicatcd particularly adapted to transform the rotary motionof a crank shaft of an engine to linear motion as applied to the enginepiston, and vicc versa.

In the drawing:

Figure 1 is a diagrammatical illustration the device through the mediumof piston 1',

then the shaft 2 may be termed the driven shaft.

On the driven shaft 2 is keyed a gear 3 and meshing with the gear 3 aretwo smaller gears 4 and 5 respect1vely. These gears 4 2 and 5 bear anydesired ratio to the gear 3 andare mounted diametrically opposite eachother as shown, on crank shafts 6 and 7 the arms 8 and 9 being angularlyarranged relative toeach other as hereinafter more fully set forth.

- On pins 10-and 11 of crank shafts 6 and 7 are mounted links 12 and 13,these links being journaled upon the piston 1 as shown at '14.

In order that function e in the manner hereinafter described it isnecessary that they be properly proportioned and arranged. Thisproportioning' and arranging is accomplished in the following manner,using the diagram in Figure 1 for the purpose of illustration.-

Starting with the given lineA-B it is first divided into five equalparts. With A as a center describe a circle C, and with 'B as a centerand-the same radius describe a circle I). Lay off the angle BAE equal to130 and the'angle ABF equal to 130 there-' by securing the radii G and Hrespectively; Erect the perpendiculars AI and BJ to the K lies in the.perpendicular bisector of AB.

If the two radii G and H are now rotated Figure 2 is an illustration ofthe device the. assembled parts may radii AE and BF, whichperpendicular-s interscct at K. Connect KE with the line about theirpivotal points A and I B with equal angular velocity in the samedirection the point K will move in a, straight line parallel with theline AB, reciprocating betweenthe points K and K An important feature inthis construction is the angle described by the radius G (and of courseH) in the two opposite movements of the point K; that is, from K to Kandfrom K to K Assuming the point K to be at K, then E will be at E an Fat F. Now, while K moves to. K the radius G will swing through the areN, E moving to E The radius H willimove through a similar are. to FItmay be seen therefore, that in 'moving K in a straight line toK?the-radii Grand H have described arcs of approximately 220. Obviously,"

then, the return movement of K to K can only carry the radii G and Hfrom E to E andjfrom F to F, through an arc of approximately 140.

If, now, the mechanism shown in Figure 2 is constructed inaccordancewith the foregoing disclosure with the gear 3 inserted asshown, the-circular pitch lines'of the two gears 4 and 5 correspondingwiththe circles C and D, the arms 8 and 9 corresponding with the radii Gand H, and the links 12 and 13 corresponding to the lines L and M, the

piston 1 will be reciprocated. along the straight line K K while a'rotary motion will be imparted to the shaft 2. In accurately. plottingthe path of'travel of the point' K it is found that while it travels ina straight line in one direction it forms a slight loop at each end ofits path of travel in the opposite direction as indicated at 14. Thisloop is so slight, however, that it may be entirely disregarded in thepractical application of the principle to a working mechanism.

It is to be understood, of course, that while I have herein shown anddescribed but one specific embodiment of the invention, changes in form,construction and method of operation may be made within the scope of theappended claims.

I claim:

1. A mechanical movement comprising a pair of spaced revoluble cranks ofequal length on spaced parallel axes and means forv driving the same atequal angular velocities in the same direction, and links of equallength pivotally connected to each substantially parallel' withsaid'first mentioned axes and to said cranks at equal distances from theiraxes of rotation.

,2. -'A mechanical movement comprising apair ofspaced "revoluble cranksof equal length positioned at given equal angles to a straight linepassing through their axes of' rotation and means for driving the sameat -the plane of axes of said cranks and to said cranks at equaldistances'from their axes of rotation. I I

3. A mechamcal movement comprislng a -pair of spaced "revoluble cranksof equal length positioned at-angles of fifty degrees to a straight linepassing through thelr axes 'of'rotation and oppositely directed relativeto a perpendicular bisector of said line and means for driving the -sameat equal angular at tion.

velocities in the same direction, and links of equal length connected toeach other and to. said cranks at equal distances'fronr their axes :ofrotation. t I v j 4.,A mechanical movement comprising a pair of spacedrevoluble cranks of equal length positioned at angles hf fifty degreesto a straight line passing through their axes of rotation and on thesameside thereof and oppositely directed'relative to a per endicularbisectorof-saidline, and means or driv ing the same'at equal angularvelocities in the same direction, and links of equal length connected toeachother and to said cranks equal distances from their axes of rota- 5.A fnechanical movement comprising a pair of revoluble cranks of equallength havtheir axes of rotation and on the same side thereof andoppositely directed relative to a perpendicular bisector of's'aidline,and links a of equal length connected to each other and 1 to said cranksat equal distances from their axes of rotation.

6. A mechanical movement comprising a pair of spaced revoluble cranks ofequal length positioned at angles of fifty degrees to a straight linepassing through their axes of rotation and on v the same side thereofand oppositely directed relative to a perpen' dicular bisector of saidline, and means for driving the same at equal angular velocities in thesame direction, and links of-e'qual length connected tosaid cranks atequal distances from their axes of rotation, and to each. other at apoint lying in said perpendicular bisector and in aline perpendicular.to either crank at'its axis of rotation.

7. A mechanical movement comprising a pair of spaced revoluble cranks ofequal length on spaced parallel axes and means for driving the same atequal angular velocities in the same direction, and links of equallength. pivotally connected to said cranks at equal distances from theiraxes of rotation and connected to each other at the intersectionofperpendiculars to said cranks at their axes of rotation whensaidcranks are positioned at an angle of fift degrees to a straight linepassing throng thelr axes.

, REUBEN ERICH'.

